There are approximately 1 million feral camels in Australia. Their ancestors were brought over in the mid 1800s because of desert conditions. Sheep are also an imported, non-native species brought over in the late 1700's. There are between 100-120 million sheep in Australia.

Sure, camels are nonnative. So are most of the humans on Australia. And the sheep. The latter two, so far, have caused a lot more damage to the land and consume more water than camels.

So, while I agree camels are probably causing some annoyance to farmers, I am not buying that they are the primary problem species nor am I buying that shooting 2/3 of them is going to solve the water issue in Australia.